where do I find this nut?

[durango dude]

I bought a drill press at a yard sale for dirt cheap. Now I'm figuring out what I get for my money.

It's made in taiwan ---- suspect it's a harbor-freight type drill press.

There's a nut missing ---- one that holds the forward pulley onto the quill shaft.

The threads of the shaft show 3/4-16 LH.

There's a challenge, though ----- the nut sits inside the pulley ----- and the pulley is only 1" in diameter.

So - what I'm looking for is a super thin 3/4-16 nut.

No stinking idea where to find one ---- none of my hardware stores have that kind of part.

[cork58]

Machine shop?

[Black wallnut]

McMaster-carr or MSC Industrial would be my first two stops. Many pulleys have nuts like that as part of the pulley.

[atgcpaul]

Could you buy the nut and grind it thinner?

[capncarl]

I'll look at my taps and see if I have a 3/4-16 LH. Nuts are not hard to make if you have the tooling. It will be Tuesday next week before I can check. The task will 1st you fabricate a nut body that fits in the pulley, then drill and tap it using the correct tap, nothing to it!
capncarl

[dangre]

Try a jam nut. Check your local Fastenal store, if you have one.

[capncarl]

The problem is Durango dude is looking for a left hand thread nut. Not common, but not that unusual for machine shops. Don't waste your time looking at the box stores.
capncarl

[durango dude]

well - I learned more than I wanted about fasteners!

I need 3/4"-16 LH Thin OD.

3/4 is thread thickness
-16 is number of threads per inch
LH indicates left-hand
Thin OD means thin outer diameter.


I might have found what I need:

http://www.summitracing.com/parts/aaf-all18289/overview/

[leehljp]

Next on the agenda - finding a left handed socket! But, if you can't find one, a counter clockwise socket will do in a pinch!

[RAFlorida]

++++ good one, great laugh, lol....

[thiggy]

I find it surprising that an import tool would have imperial threads rather than metric.

[cwsmith]

Fastenel or other local hardware supplier would probably be the second place I'd look; but first place would be to try to identify who was the manufacturer and then see if I could order the nut from them. I think that most drill presses made in the last decade or two were probably sourced from Taiwan, so the country of origin shouldn't be a problem.

I have a Ridgid DP15501 which I bought on clearance in 2003 (old grey paint scheme, 1999). The thread is not the same as yours but the nut on that model's front pulley is an M24 x 1.5 LH. (Ridgid Manual Form No. SP6158-2; Figure 1, Key # 16, Ridgid part number 827142). It makes me think that if your's was made in China or Taiwan, it would also have a metric thread, so perhaps yours is American made.

CWS

[Stytooner]

I think you would be looking for a spanner nut. Has a series of slots around the top and the edge.
Those are quite common in LH thread, however not sure about the SAE thread. I have had several machine that use this method to hold the pulley to the spindle.

Here is one variety.

http://www.amazon.com/Whirlpool-21366-Spanner-Nut/dp/B00ECV53D2/ref=sr_1_11?ie=UTF8&qid=1443467690&sr=8-11&keywords=spanner+nuts

And another.

http://www.littlemachineshop.com/products/product_view.php?ProductID=2127&category=

[capncarl]

Durango dude, did you decide were going to purchase a nut or build one?
capncarl

[capncarl]

Durango dude, I checked my taps/dies and the largest LH thread size tap I have is 1/2". Any machine shop worth their salt will have one though.